component
TPS2391DGKR
Public Unreviewedby Ray
Texas Instruments Supervisor and Reset ICs, VSSOP-8-0.65mm. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
PCB Footprint
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
Datasheet
Open in new tab ↗Loads on click. Unloads when scrolled away or the tab is hidden.
README
markdownTPS2391DGKR
Texas Instruments · Supervisor and Reset ICs · VSSOP-8-0.65mm
TPS2391DGKR from Texas Instruments, in a VSSOP-8-0.65mm. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | FAULT | output | Open-drain, active-low fault indication. Pulled low to -VIN when a fault is latched (fault timer expiration or >100 mV across sense resistor). High impedance when no fault. Max output voltage 100 V; typical driver RDS(on) 35 Ω. |
| 2 | EN | input | Enable input to turn on/off power to the load. Referenced to -VIN. Threshold ~1.4 V (rising); pulling high above threshold enables the GATE ramp, low disables the LCA and pulls the FET gate down. |
| 3 | FLTTIME | bidirectional | Fault-timeout programming pin. External capacitor to -VIN sets the fault timer period. Charged to the 4-V fault threshold during current-regulation mode to declare a fault; then discharged (fully for TPS2390 latch-off, ~1% duty for TPS2391 retry). |
| 4 | IRAMP | bidirectional | Inrush current slew-rate programming pin. External capacitor between IRAMP and -VIN sets the load-current ramp rate via the internal LCA reference; sourced with ~-10 µA (normal) or ~-600 nA (slow turn-on). Held low when disabled/faulted. |
| 5 | -VIN | power_in | Negative supply input and device reference (effectively the GND/VSS pin). Connects directly to the input supply negative rail; all pin voltages and internal circuitry are referenced to this pin. |
| 6 | ISENS | input | Current sense input. External low-value sense resistor between ISENS and -VIN feeds back load current. LCA regulates ISENS to a ~40-mV reference clamp (IMAX ≤ 40 mV/RSENSE); a fast >100 mV excursion trips the overload comparator and bypasses the fault timer. |
| 7 | GATE | output | Gate drive output for the external N-channel pass FET. Slewed by the internal LCA to control inrush; drives to ~14 V (typ VOH) to fully enhance the FET after ramp, and is pulled low rapidly during a fast overload event. |
| 8 | RTN | power_in | Positive supply input (return node of the -48 V input bus). Nominal -VIN-to-RTN operating range 36 V to 80 V; internal regulators derive bias from this rail. Absolute max 100 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8-0.65mm |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
TPS2391DGKR
CAD (KiCad official)
- Symbol:
TPS2391DGKR - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (24 pp, sha256
b85e5611df7ad276, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).